Abstract
We report on a room temperature polarization-independent intersubband photocurrent (PC) in quantum-well infrared photodetector based on a GaInAsN/GaAs standard multiple-quantum-well structure. The dominant room temperature PC is peaked at 1.42 μm with peak responsivity of 2 A/W and exhibits similar intensities in TM and TE polarizations. The structure's energy levels were analyzed using a ten band k·p model. As a result of this analysis the 1.42 μm dominant PC transition is attributed to a transition from the fundamental E1- electron level into the localized quasicontinuum state formed by the unconfined E2+ electron energy level.
| Original language | English |
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| Article number | 093503 |
| Journal | Applied Physics Letters |
| Volume | 94 |
| Issue number | 9 |
| DOIs | |
| State | Published - 2009 |
| Externally published | Yes |